Particulate control systems and methods for olfaction sensors

ABSTRACT

A vehicle system includes: an olfaction sensor comprising: a blower configured to draw air through an inlet; a filter configured to filter particulate from the air; and a volatile organic compounds (VOC) sensor disposed downstream of the filter and configured to measure an amount of VOCs in air after the air flows through the filter; and a control module configured to selectively take one or more remedial actions based on the amount of VOCs.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application No. 63/067,926, filed on Aug. 20, 2020. The entire disclosure of the application referenced above is incorporated herein by reference.

FIELD

The present disclosure relates to vehicles and more particularly to olfaction sensors with filters.

BACKGROUND

This section provides background information related to the present disclosure which is not necessarily prior art.

Vehicles have been recalled due to carbon monoxide entering their passenger cabins and for other reasons. Humans may be overcome by carbon monoxide and lose consciousness.

There may be numerous other situations where chemicals could be present within a passenger cabin of a vehicle. For example, a user may bring an aerosol can in to the passenger cabin of a vehicle and forget to take it out. Due to heat or cold, the aerosol can could emit its contents into the passenger cabin. One or more users could enter the vehicle later and breathe the contents without knowledge.

Electric vehicles include one or more batteries that contain chemicals, such as lithium. The batteries may be located under the passenger cabin and, under some circumstances, can rupture and emit chemicals. Some chemicals that may be present within a passenger cabin of a vehicle may be odorless and colorless.

SUMMARY

In a feature, a vehicle system includes: an olfaction sensor comprising: a blower configured to draw air through an inlet; a filter configured to filter particulate from the air; and a volatile organic compounds (VOC) sensor disposed downstream of the filter and configured to measure an amount of VOCs in air after the air flows through the filter; and a control module configured to selectively take one or more remedial actions based on the amount of VOCs.

In further features, the olfaction sensor includes: a first chamber;

a second chamber having an opening, where the VOC sensor is disposed within the second chamber; and the filter covers the opening.

In further features, a dispenser is configured to dispense a clean portion of the filter to in front of the opening and to move a dirty portion of the filter into the first chamber.

In further features, a particulate sensor is disposed within the first chamber and is configured to measure an amount of particulate within the first chamber.

In further features, a heating element is configured to heat a portion of the filter within the first chamber.

In further features, the filter includes a roll of filter material and the dispenser is configured to rotate the roll of filter material.

In further features, collector plates are configured to draw particulate toward the collector plates when power is applied to the collector plates.

In further features, the collector plates are disposed downstream of the filter.

In further features, an ionizer is configured to electrically charge the particulate in the air.

In further features, the ionizer is disposed between (a) the filter and (b) the collector plates.

In further features, the control module is configured to apply a first reference potential to a first one of the collector plates and a second reference potential that is different than the first reference potential to a second one of the collector plates.

In further features, the first reference potential is positive and the second reference potential is negative.

In a feature, an olfaction sensor of a vehicle includes: an inlet; a blower configured to draw air through the inlet; a filter configured to capture particulate from the air; a heating element configured to heat a portion of the filter after the portion of the filter has captured particulate from the air, the heating of the portion of the filter producing heated gas; and a VOC sensor configured to measure an amount of VOCs in the heated gas.

In further features, the olfaction sensor further includes: a first chamber; a second chamber having an opening, where the VOC sensor is disposed within the second chamber; and the filter covers the opening.

In further features, the olfaction sensor further includes a particulate sensor disposed within the first chamber and configured to measure an amount of particulate within the first chamber.

In further features, the olfaction sensor further includes at least one collector plate configured to draw particulate toward the at least one collector plate when power is applied to the at least one collector plate.

In further features, the at least one collector plate is disposed to draw the particulate toward the filter.

In a feature, an olfaction sensor of a vehicle includes: an inlet; a blower configured to draw air through the inlet; a filter configured to filter particulate from the air; collector plates configured to draw particulate toward the filter and toward the collector plates when power is applied to the collector plates; and a VOC sensor disposed downstream of the collector plates and configured to measure an amount of VOCs in air.

In further features, a control module is configured to apply a first reference potential to a first one of the collector plates and a second reference potential that is different than the first reference potential to a second one of the collector plates.

In further features, the first reference potential is positive and the second reference potential is negative.

Further areas of applicability of the present disclosure will become apparent from the detailed description, the claims and the drawings. The detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the disclosure.

DRAWINGS

The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

FIG. 1 is a functional block diagram of an example vehicle system.

FIGS. 2, 3A, 3B, and 4 are diagrams including an example olfaction sensor system of a vehicle.

FIG. 5 is a functional block diagram of an example control system.

Corresponding reference numerals indicate corresponding parts throughout the several views of the drawings.

DETAILED DESCRIPTION

Example embodiments will now be described more fully with reference to the accompanying drawings.

Some types of olfaction sensors, such as VOC sensors, may be sensitive to particulate matter. For example, particulate matter can clog (e.g., form a coating over) a VOC sensor and prevent the VOC sensor from measuring the amount of VOC in air properly. This may make detecting some odors that include particulate matter challenging as the particulate may damage the VOC sensor and/or decrease the accuracy of the measurements of the VOC sensor.

The present application involves filtering particulate from air before the air reaches a VOC sensor or another type of olfaction sensor that is sensitive to particulate. This may increase accuracy of measurements of the VOC sensor and increase a lifetime of the VOC sensor.

FIG. 1 includes a functional block diagram including an example vehicle 5. The vehicle 5 includes a control module 8 and one or more olfaction sensors, such as olfaction sensor 10. Examples of olfaction sensors in vehicles include, for example, particulate matter sensors, carbon monoxide (or other carbon oxide) sensors, volatile organic compound (VOC) sensors, and other types of sensors. The vehicle 5 may include one or more different types of olfaction sensors.

The olfaction sensor(s) are each configured to measure an amount of one or more chemicals within a passenger cabin of the vehicle 5. For example, the vehicle 5 may include a particulate matter sensor configured to measure one or more amounts (e.g., concentrations or mass flow rates) of particulate of one or more different sizes (e.g., less than one or more predetermined sizes or in one or more predetermined size ranges) in air within the passenger cabin. Additionally or alternatively, the vehicle 5 may include a carbon monoxide sensor configured to measure an amount (e.g., concentration) of carbon monoxide in air within the passenger cabin. Additionally or alternatively, the vehicle 5 may include a VOC sensor configured to measure an amount (e.g., concentration) of VOCs within the passenger cabin.

The control module 8 may receive the measurements from the olfaction sensor(s) and take one or more remedial actions based on the measurements. For example, when one or more amount of one or more chemicals (e.g., particulate, carbon monoxide, VOCs) measured by one or more olfaction sensors is/are greater than one or more respective predetermined amount/s (e.g., of particulate matter, carbon monoxide, or VOCs, respectively), the control module 8 may take one or more remedial actions. The predetermined amount/s is/are greater than zero.

For example, the control module 8 may open one or more windows 12 of the vehicle 5 when the amount of a chemical is greater than the predetermined amount. Additionally or alternatively, the control module 8 may generate an alert within the vehicle 5 when the amount of a chemical is greater than the predetermined amount. For example, the control module 8 may generate or display a visual alert, such as via a visual indicator 14 that is visible within the passenger cabin of the vehicle 5. The visual indicator 14 may be, for example, one or more indicator lights, a display, or another suitable type of visual indicator. Additionally or alternatively, the control module 8 may output an audible alert, such as via one or more speakers. Additionally or alternatively, the control module 8 may output a tactile alert, such as via turning on one or more vibrating devices, such as located in one or more seats, in a steering wheel, or in another suitable location.

Additionally or alternatively, the control module 8 may turn on a heating ventilation and air conditioning (HVAC) system 16 of the vehicle 5 when the amount of a chemical is greater than the predetermined amount. The control module 8 may, for example, turn on a blower of the HVAC system 16 and control one or more actuators of the HVAC system 16 to recirculate air from within the passenger cabin to outside of the passenger cabin. This is discussed in more detail below.

Additionally or alternatively, the control module 8 may store an indicator in memory of the vehicle when the amount of a chemical is greater than the predetermined amount. The indicator may indicate that the amount of the chemical was greater than the predetermined amount. The control module 8 may also store a time stamp (e.g., including a date and a time of the occurrence) with the indicator.

Additionally or alternatively, the control module 8 may transmit an indicator to a remote device 20, such as of a fleet operator, when the amount of a chemical is greater than the predetermined amount. The control module 8 may transmit the indicator via one or more communication networks, such as a cellular communication network, a satellite communication network, a Wi-Fi communication network, or another suitable type of communication network.

FIG. 2 is a functional block diagram of an example implementation of an olfaction sensor 100. The olfaction sensor 100 may be implemented within the HVAC system 16 (e.g., in a duct of the HVAC system 16) or in another location within the passenger cabin of the vehicle 5. As discussed above, the vehicle 5 may include multiple olfaction sensors.

Some types of olfaction sensors (e.g., VOC sensors) may be sensitive to particulate matter. For example, particulate matter can clog (e.g., form a coating over) a VOC sensor and prevent the VOC sensor from measuring the amount of VOC in air properly. This may make detecting some odors that include particulate matter challenging as the particulate may damage the VOC sensor and/or decrease the accuracy of the measurements of the VOC sensor.

The present application involves constricting particulate in an air sample onto a surface (e.g., a filter or a charged plate) upstream of the VOC filter. In the example of a filter, the filter may be moved into a separate chamber for measurement of particulate and/or odor.

The olfaction sensor 100 includes a blower 104 that draws air through an inlet 108. Air is output from the olfaction sensor 100 via an outlet 112. While FIG. 2 includes the example of the blower 104 drawing air through a filter 116 to a VOC sensor 120, the blower 104 may be located in another suitable location. For example, the blower 104 may be implemented upstream of the filter 116 and blow air to the filter 116 or between the VOC sensor 120 and the filter 116.

As shown, the filter 116 is located upstream of the VOC sensor 120 in the direction of airflow. The filter 116 filters particulate from the air before the air flows to the VOC sensor 120. Particulate is therefore removed from the air before measurement of the VOCs in the air by the VOC sensor 120. Particulate filtered by the filter 116 therefore does not contact the VOC sensor 120. The VOC sensor 120 measures an amount of VOCs in the filtered air output from the filter 116.

In various implementations, the olfaction sensor 100 may include a first chamber 124 and a second chamber 128. The first chamber 124 and the second chamber 128 may be sealed chambers such that air does not flow from the second chamber 128 to the first chamber 124 or vice versa.

The filter 116 may be disposed in and cover an opening of the second chamber 128 such that all air flowing into the second chamber 128 and to the VOC sensor 120 is first filtered by the filter 116.

The filter 116 may be any suitable type of filter media. The filter may include (e.g., only) openings that are less than a predetermined size (e.g., X microns, where X is a number greater than 0). In this manner the filter 116 may be configured to filter particulate having the predetermined size or greater. The filter 116 may be a filter paper, such as a dry filter paper in various implementations. Alternatively, the filter paper may be an oiled filter paper. In various implementations, the filter 116 may be a cellulose filter. The filter 116 may be folded or unfolded.

As one example, the filter 116 may be stored on a roll or spool, such as in the examples of FIGS. 3A and 3B. As shown in the example of FIG. 3B, a cassette format may be used. A clean portion of the filter 116 may be stored on a first spool 200 of the filter 116. After being disposed in front of the opening (in the direction of airflow) to the second chamber 128 (or otherwise being used to filter particulate), the used portion of the filter 116 may be moved into the first chamber 124 and onto a second spool 204 of the filter 116. While the example of the filter 116 on a roll or spool is provided, the filter 116 may alternatively be a replaceable (e.g., rectangular) planar filter sized to block the opening. Rolls or spools of the filter 116 may also be replaceable.

A dispenser 132 (FIG. 2 ) may selectively dispense a clean portion of the filter 116 onto/in front of the opening (or otherwise into a position to filter particulate). The dispenser 132 may, for example, drive/rotate the second spool 204 to move clean portions of the filter 116 to the opening. The dispenser 132 may, for example, rotate the second spool 204 by a predetermined amount every predetermined period or for each air sample. Rotating the second spool 204 moves the filter 116 by a predetermined amount (e.g., distance) such that a clean portion of the filter 116 is disposed at the opening. The dispenser 132 may include, for example, an electric motor.

A particulate matter sensor 136 may measure particulate on the filter 116 (the used portion that was previously disposed in front of the opening to the second chamber 128) within the first chamber 124. One or more other types of olfaction sensors may additionally be implemented in the first chamber 124 and measure one or more amounts of one or more other chemicals in the used portion of the filter 116.

In an example, the olfaction sensor 100 may include two chambers. Air passes through the first chamber 124 and a cassette tape/paper roll of filter material collects particulate in the air that passes through the filter. Once air has passed through the filter (e.g., for a predetermined period), that filter material that covered the opening is moved to the first chamber 124 where it is analyzed for smoking and other odor/particulate matter by one or more olfaction sensors. In various implementations, the first chamber 124 may be heated, for example, to increase a smell present within the first chamber 124. The VOC sensor 120 therefore receives filtered air, thereby increasing the accuracy of measurements of the VOC sensor 120 and increasing a lifetime of the VOC sensor 120. In various implementations, the second chamber 128 may seal a housing 140 of the olfaction sensor 100 such that air must flow through the opening of the second chamber 128 and the filter 116. The second chamber 128 also includes a second opening through which the blower 104 draws air.

Smoke particulate can damage electronics, such as those configured to smell (e.g., olfaction sensors). The present application involves capturing particulate (including smoke particulate) upstream of one or more olfaction sensor(s) to help protect the olfaction sensor(s).

As shown in FIG. 4 , a collector 300 may be implemented downstream of the filter 116. The collector 300 may include two or more (e.g., electrically conductive) collector plates that are separated (e.g., by air) such that air can flow between the collector plates. One collector plate is electrically connected to a positive (+) reference potential (voltage), the next adjacent collector plate is connected to a negative (−) reference potential, the next adjacent collector plate is connected to the positive reference potential, and so on. As such, the collector 300 may include a plurality of alternatively positively and negatively charged collector plates, such as shown in the top illustration of FIG. 4 . The electrical charging of the collector plates may draw particulate to the filter 116 and/or cause particulate that travels through the filter 116 to collect on some or all of the collector plates.

The collector 300 is located upstream of the VOC sensor 120. The reference potentials are applied to the collector plates before and while the VOC sensor 120 is measuring VOCs such that particulate is drawn away from the VOC sensor 120 during measurement. In various implementations, the reference potentials may be continuously applied to the collector plates while the vehicle is on. Particulate collects on the positively and/or negatively charged collector plates. The collector plates include a sufficient surface area to collect at least a predetermined amount (e.g., all) of the particulate in the air. In various implementations, a twisted tubular shape may be used.

In various implementations, a magnetic field (e.g., generated by the collector 300) may electrically attract particulate to the filter 116. As shown in FIG. 4 , a heating element may heat a used/dirty portion of the filter 116 (e.g., within the first chamber as shown in FIG. 2 ). The heating may cause the filter 116 to give off a scent that an olfaction sensor can measure/smell. The heating element may include, for example, an electric heater (e.g., a resistive heater) that generates heat when power is applied to the heater. Alternatively, the heating element may include one or more burners configured to combust one or more combustible fuels to generate heat.

The above may prevent or decrease VOC sensor damage from particulate matter by applying a rolling filter paper over the charged collector plates. The particulate is attracted to the charged collector plate(s), and is captured by the filter paper and the collector plate(s). Once this filter paper is saturated with particulate, the filter paper passes over a heating element. The heating vaporizes the particulate and releases VOCs for measurement by the VOC sensor.

In various implementations, the olfaction sensor 100 may include an ionizer 304, such as disposed between the filter 116 and the collector 300 (upstream of the collector 300). The ionizer 304 may electrically charge the particulate matter in the air output. The charged particulate matter will be attracted to the collector 300 where the filter 116 covers the plates and captures the attracted particulates.

FIG. 5 is a functional block diagram of an example implementation of a control system. As discussed above, one or more olfaction sensors may be included, such as at least one of a VOC sensor, a particulate matter sensor, and a carbon monoxide sensor. The olfaction sensor 100 of FIG. 5 may include a VOC sensor, and a particulate matter sensor. The olfaction sensor 100 may additionally include a carbon monoxide sensor.

A comparison module 504 compares a measurement from the olfaction sensor 100 with a predetermined value and generates an output signal based on the comparison. The measurement may be, for example, an amount of particulate, an amount of VOCs, or an amount of carbon monoxide. The comparison module 504 may set the output signal to the first state when the measurement is less than the predetermined value and set the output signal to a second state when the measurement is greater than or equal to the predetermined value.

The comparison module 504 may obtain the predetermined value from memory 508. The predetermined value is greater than zero and may be a fixed predetermined value. Alternatively, the predetermined value may be variable. For example, a baseline module 512 may determine a baseline value and set the predetermined value to the baseline value. The baseline module 512 may set the baseline value, for example, based on or equal to an average of the measurements from the olfaction sensor 100 taken over a predetermined period, such as a week or a month. An average may be determined by summing the measurements and dividing by the number of measurements summed.

One or more remedial actions may be taken when the output signal of the comparison module 504 is in the second state. For example, a window actuator module 516 controls actuation (opening and closing) of one or more window actuators, such as window actuator 520, of the vehicle. The window actuator 520 opens (e.g., lowers) and closes (e.g., raises) a window of the vehicle. The window actuator module 516 may control one or more window actuators to open one, more than one, or all of the windows of the vehicle when the output signal of the comparison module 504 is in the second state. Opening the window(s) may include, for example, opening the window(s) to a partially open position further than the window(s) is/are presently open or opening the window(s) to a fully open position.

Additionally or alternatively, an alert module 524 may generate an alert (e.g., visually the visual indicator 14, audibly via one or more speakers, and/or haptically via one or more vibrating devices) when the output signal of the comparison module 504 is in the second state. Additionally or alternatively, a blower control module 528 turn on a blower 532 of the HVAC system 16 when the output signal of the comparison module 504 is in the second state.

Additionally or alternatively, a communication module 540 may wirelessly transmit an indicator to the remote device 20 via one or more antennas 544 when the output signal of the comparison module 504 is in the second state. Additionally or alternatively, a storage module 548 may store an indicator in the memory 508 when the output signal of the comparison module 504 is in the second state. The indicator may indicate that the amount of the chemical was greater than the predetermined value. The storage module 548 may also store a time stamp (e.g., including a date and a time of the occurrence) with the indicator. A clock 552 may track the date and time.

The control module 8 may also include a power control module 560 that applies power from a power source 564 to the collector 300 as described above. The power source 564 may be, for example, a battery of the vehicle, a power converter of the vehicle, or another suitable type of source of electrical power. The power applied to the collector 300 may be alternating current (AC) power or direct current (DC) power.

In various implementations, the control module 8 may include a collector monitor module 580. The collector monitor module 580 may monitor one or more characteristics of the collector 300, such as a voltage of the collector 300, a current through the collector 300, etc. The collector monitor module 580 may determine whether the collector 300 should be cleaned based on the one or more characteristics. The collector monitor module 580 generates an output when the collector 300 is saturated/covered with particulate and should be cleaned. The alert module 524 may generate an alert (e.g., visually the visual indicator 14, audibly via one or more speakers, and/or haptically via one or more vibrating devices) when the collector monitor module 580 indicates that the collector 300 should be cleaned. The alert may serve as a notification to clean the collector 300.

The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.

Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

In this application, including the definitions below, the terms “module” and “system” may refer to, be part of, or include circuits or circuitry that may include processor hardware (shared, dedicated, or group) that executes code and memory hardware (shared, dedicated, or group) that stores code executed by the processor hardware. The code is configured to provide the features of the modules and systems described herein. In addition, in this application the terms “module” and “system” may be replaced with the term “circuit.” The term “memory hardware” may be a subset of the term computer-readable medium. The term computer-readable medium does not encompass transitory electrical and electromagnetic signals propagating through a medium, and may therefore be considered tangible and non-transitory. Non-limiting examples of a non-transitory tangible computer readable medium include nonvolatile memory, volatile memory, magnetic storage, and optical storage.

The apparatuses and methods described in this application may be partially or fully implemented by a special purpose computer created by configuring a general purpose computer to execute one or more particular functions embodied in computer programs. The functional blocks, flowchart components, and other elements described above serve as software specifications, which can be translated into the computer programs by the routine work of a skilled technician or programmer.

The computer programs include processor-executable instructions that are stored on at least one non-transitory, tangible computer-readable medium. The computer programs may also include or rely on stored data. The computer programs may encompass a basic input/output system (BIOS) that interacts with hardware of the special purpose computer, device drivers that interact with particular devices of the special purpose computer, one or more operating systems, user applications, background services, background applications, etc.

The computer programs may include: (i) descriptive text to be parsed, such as JavaScript Object Notation (JSON), hypertext markup language (HTML) or extensible markup language (XML); (ii) assembly code; (iii) object code generated from source code by a compiler; (iv) source code for execution by an interpreter; (v) source code for compilation and execution by a just-in-time compiler, etc. As examples only, source code may be written using syntax from languages including C, C++, C#, Objective C, Haskell, Go, SQL, R, Lisp, Java®, Fortran, Perl, Pascal, Curl, OCaml, Javascript®, HTML5, Ada, ASP (active server pages), PHP, Scala, Eiffel, Smalltalk, Erlang, Ruby, Flash®, Visual Basic®, Lua, and Python®.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms “a,” “an,” and “the” may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “comprising,” “including,” and “having,” are inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It is also to be understood that additional or alternative steps may be employed.

When an element or layer is referred to as being “on,” “engaged to,” “connected to,” or “coupled to” another element or layer, it may be directly on, engaged, connected or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being “directly on,” “directly engaged to,” “directly connected to,” or “directly coupled to” another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as “first,” “second,” and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

Spatially relative terms, such as “inner,” “outer,” “beneath,” “below,” “lower,” “above,” “upper,” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the example term “below” can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. 

What is claimed is:
 1. A vehicle system, comprising: an olfaction sensor comprising: a blower configured to draw air through an inlet; a filter configured to filter particulate from the air; a volatile organic compounds (VOC) sensor disposed downstream of the filter and configured to measure an amount of VOCs in air after the air flows through the filter; a first chamber; a second chamber having an opening, wherein the VOC sensor is disposed within the second chamber; and the filter covers the opening; a dispenser configured to dispense a clean portion of the filter to in front of the opening and to move a dirty portion of the filter into the first chamber; and a particulate sensor disposed within the first chamber and configured to measure an amount of particulate within the first chamber; and a control module configured to selectively take one or more remedial actions based on the amount of VOCs.
 2. The vehicle system of claim 1 further comprising a heating element configured to heat a portion of the filter within the first chamber.
 3. The vehicle system of claim 1 wherein the filter includes a roll of filter material and the dispenser is configured to rotate the roll of filter material.
 4. The vehicle system of claim 1 further comprising collector plates configured to draw particulate toward the collector plates when power is applied to the collector plates.
 5. The vehicle system of claim 4 wherein the collector plates are disposed downstream of the filter.
 6. The vehicle system of claim 4 further comprising an ionizer configured to electrically charge the particulate in the air.
 7. The vehicle system of claim 6 wherein the ionizer is disposed between (a) the filter and (b) the collector plates.
 8. The vehicle system of claim 4 wherein the control module is configured to apply a first reference potential to a first one of the collector plates and a second reference potential that is different than the first reference potential to a second one of the collector plates.
 9. The vehicle system of claim 8 wherein the first reference potential is positive and the second reference potential is negative.
 10. An olfaction sensor of a vehicle, comprising: an inlet; a blower configured to draw air through the inlet; a filter configured to capture particulate from the air; a heating element configured to heat a portion of the filter after the portion of the filter has captured particulate from the air, the heating of the portion of the filter producing heated gas; a VOC sensor configured to measure an amount of VOCs in the heated gas; a first chamber; a second chamber having an opening, wherein the VOC sensor is disposed within the second chamber, and wherein the filter covers the opening; and a particulate sensor disposed within the first chamber and configured to measure an amount of particulate within the first chamber.
 11. The olfaction sensor of claim 10 further comprising at least one collector plate configured to draw particulate toward the at least one collector plate when power is applied to the at least one collector plate.
 12. The olfaction sensor of claim 11 wherein the at least one collector plate is disposed to draw the particulate toward the filter.
 13. An olfaction sensor of a vehicle, comprising: an inlet; a blower configured to draw air through the inlet; a filter configured to filter particulate from the air; collector plates configured to draw particulate toward the filter and toward the collector plates when power is applied to the collector plates; and a VOC sensor disposed downstream of the collector plates and configured to measure an amount of VOCs in air; a first chamber; a second chamber having an opening, wherein the VOC sensor is disposed within the second chamber, and wherein the filter covers the opening; and a particulate sensor disposed within the first chamber and configured to measure an amount of particulate within the first chamber.
 14. A system comprising: the olfaction sensor of claim 13; and a control module configured to apply a first reference potential to a first one of the collector plates and a second reference potential that is different than the first reference potential to a second one of the collector plates.
 15. The system of claim 14 wherein the first reference potential is positive and the second reference potential is negative. 